Image Generating Apparatus, Method, and Program for Displaying Image Resolution with Motion in Head-Mounted Display (hmd)

1. An image generating apparatus, comprising: a motion detecting section acquiring information associated with a motion of a head of a user wearing a head-mounted display and deciding presence or absence of the motion; a resolution controlling section performing setting in which a resolution of a part of a display image is more reduced when there is a motion of the head than when there is no motion of the head; an image generating section generating a display image with a resolution following the setting; and an output section outputting data associated with the display image to the head-mounted display, wherein an entirety of the display image is shown at a full resolution when there is no motion of the head, wherein the part of the display image having reduced resolution is plane-divided into a plurality of adjacent subareas, with each subarea of the plurality of subareas having decreased resolution from an adjacent subarea, wherein the image generating section generates stereo images including a pair of an image for a first eye and an image for a second eye as the display image, and wherein, when transmission is made from a state in which there is a motion of the head to a state in which there is no motion of the head, the resolution controlling section provides a period of time for which the resolution of the image for the first eye is returned back to an original resolution before the image for the second eye is returned back to the original resolution.

2. The image generating apparatus according to claim 1 , wherein the resolution controlling section acquires information associated with position coordinates of a gaze point of the user for an image displayed on the head-mounted display and, in the display image, sets a resolution of an outside of a gaze area in a predetermined range from the gaze point so as to be lower than a resolution of an inside of the gaze area in the predetermined range from the gaze point.

3. The image generating apparatus according to claim 2 , wherein the resolution controlling section sets the gaze area so as to be narrower as the speed of the head is higher.

4. The image generating apparatus according to claim 1 , wherein the resolution controlling section sets the resolution of the display image lower as a speed of the head is higher.

5. The image generating apparatus according to claim 1 , further comprising: a data acquiring section acquiring data associated with a photographed image which is photographed with the head-mounted display and used in generation of the display image, wherein the resolution controlling section causes data transmitted, the data for which a resolution of a part of the photographed image is more reduced when there is the motion of the head than when there is no motion of the head, to the head-mounted display.

6. The image generating apparatus according to claim 1 , further comprising: a dominant eye deciding section for determining a dominant eye having a higher gaze stability, wherein the resolution controlling section displays a higher resolution display image to the dominant eye than an other eye.

7. An image generating method by an image generating apparatus, comprising: acquiring information associated with a motion of a head of a user wearing a head-mounted display and deciding presence or absence of the motion; performing setting in which a resolution of a part of a display image is more reduced when there is a motion of the head than when there is no motion of the head; generating a display image with a resolution following the setting; and outputting data associated with the display image to the head-mounted display, wherein an entirety of the display image is displayed at a full resolution when there is no motion of the head, wherein the part of the display image having reduced resolution is plane-divided into a plurality of adjacent subareas, with each subarea of the plurality of subareas having decreased resolution from an adjacent subarea, and wherein the display image includes a pair of an image for a first eye and an image for a second eye; and providing a period of time for which the resolution of the image for the first eye is returned back to an original resolution before the image for the second eye is returned back to the original resolution when transmission is made from a state in which there is a motion of the head to a state in which there is no motion of the head.

8. A non-transitory computer readable medium having stored thereon a computer program for a computer, the computer program comprising: by a motion detecting section, acquiring information associated with a motion of a head of a user wearing a head-mounted display and deciding presence or absence of the motion; by a resolution controlling section, performing setting in which a resolution of a plurality of areas of a display image are more reduced when there is a motion of the head than when there is no motion of the head; by an image generating section, generating a display image with a resolution following the setting; and by an output section, outputting data associated with the display image to the head-mounted display, wherein the plurality of areas are a plurality of concentric rings centered at a focus point, wherein a resolution of each concentric ring has decreased resolution from an adjacent inner concentric ring, wherein the image generating section generates stereo images including a pair of an image for a first eye and an image for a second eye as the display image, and wherein, when transmission is made from a state in which there is a motion of the head to a state in which there is no motion of the head, the resolution controlling section provides a period of time for which the resolution of the image for the first eye is returned back to an original resolution before the image for the second eye is returned back to the original resolution.